Hub on a VM didn't have enough randomness to start.

I started the hub install on Ubuntu 15.04 on a Digital Ocean server and after configuring the url the console said I didn't have enough randomness. I had to follow these instructions to get it going.... http://blog.pedrocarrico.net/post/17026199379/low-entropy-on-vms

most notably:

sudo apt-get install haveged

My randomness increased from 35 to 2000 something...